Lewis Hamilton tweeted on Saturday that his staff had been held at gunpoint while leaving the Interlagos circuit in Brazil.It appears nobody was harmed in the incident, but Hamilton said the team was shaked after guns were held to heads, and shots were fired.

The news has sparked questions over the safety of the race in Brazil, where political and social tensions are high.

Many Brazilians are pointing the incident as being emblematic of wider problems in the country.